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參數(shù)資料
| 型號： | STR-A6251 |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 373K |
| 代理商： | STR-A6251 |
Universal-Input/15 W 50 kHz
Flyback Switching Regulators
D
2
STR-A6251
AND
STR-A6252
Sanken Power Devices
fromAllegro MicroSystems
Swthn
Reuaos
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25°C
Control Supply Voltage, V
CC
. . . .
36 V
Drain-Source Voltage, V
DSS. . . . . .
650 V
Drain Switching Current, I
D
STR-A6251 . . . . . . . . . . . . . .
2.5 A*
STR-A6252 . . . . . . . . . . . . . .
3.0 A*
Peak Drain Switching Current, I
DM
STR-A6251 . . . . . . . . . . . . . . .
2.5 A
STR-A6252 . . . . . . . . . . . . . . .
3.0 A
Single-Pulse Avalanche Energy, E
AS
STR-A6251 . . . . . . . . . . . . . .
72 mJ
STR-A6252 . . . . . . . . . . . . .
123 mJ
S/OCP Voltage Range,
V
OCP
. . . . . . . . . . . .
–0.3 V to +6 V
FB/CC/OLP Voltage Range,
V
FB/OLP
. . . . . . . . . .
–0.3 V to +12 V
FM Voltage Range,
V
FM
. . . . . . . . . . . . .
–0.3 V to +6 V
Package Power Dissipation, P
D
control (V
CC
× I
CC(ON)
) . . . . .
0.15 W
MOSFET (V
DSS
× I
D
). . . . . .
1.35 W
total. . . . . . . . . . . . . . . . . . . .
1.5 W
MOSFET Channel Temp., T
J
.
+150°C
Internal Frame Temp., T
F
. . . .
+125°C
Storage Temperature Range,
T
S
. . . . . . . . . . . .
-40°C to +125°C
* Drain switching current is limited by tem-
perature (page 2) and safe operating area
(page 4).
The STR-A6251 and STR-A6252 are 50 kHz PWM topology (with
±5% frequency jittering for minimum EMI) regulators specifically
designed to satisfy the requirements for increased integration and
reliability in flyback converters. They incorporate a primary control and
drive circuit with avalanche-rated power MOSFETs. The STR-A6252
features higher allowable switching current and lower on-resistance.
The STR-A6251 is also available for 67 kHz operation.
Covering the power range from below 21 watts or 24 watts for a
230 VAC input, or to 15 or 20 watts for a universal (85 to 264 VAC)
input, these devices can be used in a wide range of applications, from
DVD players and VCR player/recorders to ac adapters for cellular
phones and digital cameras. An auto-burst standby function reduces
power consumption at light load, while multiple protections, including
the avalanche-energy guaranteed MOSFET, provide high reliability of
system design.
Cycle-by-cycle current limiting, undervoltage lockout with hyster-
esis, overvoltage protection, and thermal shutdown protect the power
supply during the normal overload and fault conditions. Overvoltage
protection and thermal shutdown are latched after a short delay. The
latch may be reset by cycling the input supply. Low start-up current and
a low-power standby mode selected from the secondary circuit completes
a comprehensive suite of features. Both devices are provided in an 8-pin
mini-DIP plastic package with pin 6 removed.
FEATURES
AND
BENEFITS
■
50 kHz PWM with ±5% Frequency Jittering
Cost Reduction of EMI Noise Filtering
■
Rugged 650 V Avalanche-Rated MOSFET
Simplified Surge Absorption
No V
DSS
Derating Required
■
Choice of
r
DS(on)
(2.8
Ω
or 3.95
Ω
maximum)
■
Auto-Burst Mode for Stand-By Operation or Light Loads
Less Transformer Audible Noise
■
Built-In Leading Edge Blanking
■
Soft Start and Low Start-Up Current
Start-Up Circuit Disabled in Operation
■
Low Operating Current (4 mA max)
continued
Always order by complete part number, e.g.,
STR-A6251
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STR-A6251M | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Universal-Input/15 W 67 kHz Flyback Switching Regulator |
| STR-A6259H | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Universal-Input 13 W 100 kHz Flyback Switching Regulators |
| STR-A6372 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:INTEGRATED SWITCHER |
| S-TRACK INTERFACE | 制造商:VOX Power 功能描述:SERIES TRACKING INTERFACE |
| STRAIGHT ENDBELL FLEX TUBE 10 | 制造商:ITT Interconnect Solutions 功能描述: |
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